It takes 5 minutes to pass a rumor from one form one person to another person. The Tree of Rumour continues. How many persons would know the Rumour after 20 minutes?
16
27
81
none
All mangoes are yellow. Yellow color things are not cheap. what conclusion follows?
All mangoes are cheap
Yellow colored mangoes are not cheap
Mangoes are expensive
None of these
The smallest unit of heredity is _____?
chromosomes
gene
nucleotide
none
Which of the following is a pure substance made up of two or more types of atoms or elements?
crystal
compound
mixture
none
Gastric juice is a fluid formed within the stomach lining with has pH value of about ____?